1 /*
2 * Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /* We need to use some deprecated APIs */
11 #include "internal/deprecated.h"
12
13 #include "eng_local.h"
14 #include <openssl/evp.h>
15
16 static ENGINE_TABLE *pkey_meth_table = NULL;
17
ENGINE_unregister_pkey_meths(ENGINE * e)18 void ENGINE_unregister_pkey_meths(ENGINE *e)
19 {
20 engine_table_unregister(&pkey_meth_table, e);
21 }
22
engine_unregister_all_pkey_meths(void)23 static void engine_unregister_all_pkey_meths(void)
24 {
25 engine_table_cleanup(&pkey_meth_table);
26 }
27
ENGINE_register_pkey_meths(ENGINE * e)28 int ENGINE_register_pkey_meths(ENGINE *e)
29 {
30 if (e->pkey_meths) {
31 const int *nids;
32 int num_nids = e->pkey_meths(e, NULL, &nids, 0);
33 if (num_nids > 0)
34 return engine_table_register(&pkey_meth_table,
35 engine_unregister_all_pkey_meths, e,
36 nids, num_nids, 0);
37 }
38 return 1;
39 }
40
ENGINE_register_all_pkey_meths(void)41 void ENGINE_register_all_pkey_meths(void)
42 {
43 ENGINE *e;
44
45 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
46 ENGINE_register_pkey_meths(e);
47 }
48
ENGINE_set_default_pkey_meths(ENGINE * e)49 int ENGINE_set_default_pkey_meths(ENGINE *e)
50 {
51 if (e->pkey_meths) {
52 const int *nids;
53 int num_nids = e->pkey_meths(e, NULL, &nids, 0);
54 if (num_nids > 0)
55 return engine_table_register(&pkey_meth_table,
56 engine_unregister_all_pkey_meths, e,
57 nids, num_nids, 1);
58 }
59 return 1;
60 }
61
62 /*
63 * Exposed API function to get a functional reference from the implementation
64 * table (ie. try to get a functional reference from the tabled structural
65 * references) for a given pkey_meth 'nid'
66 */
ENGINE_get_pkey_meth_engine(int nid)67 ENGINE *ENGINE_get_pkey_meth_engine(int nid)
68 {
69 return ossl_engine_table_select(&pkey_meth_table, nid,
70 OPENSSL_FILE, OPENSSL_LINE);
71 }
72
73 /* Obtains a pkey_meth implementation from an ENGINE functional reference */
ENGINE_get_pkey_meth(ENGINE * e,int nid)74 const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid)
75 {
76 EVP_PKEY_METHOD *ret;
77 ENGINE_PKEY_METHS_PTR fn = ENGINE_get_pkey_meths(e);
78 if (!fn || !fn(e, &ret, NULL, nid)) {
79 ERR_raise(ERR_LIB_ENGINE, ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
80 return NULL;
81 }
82 return ret;
83 }
84
85 /* Gets the pkey_meth callback from an ENGINE structure */
ENGINE_get_pkey_meths(const ENGINE * e)86 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e)
87 {
88 return e->pkey_meths;
89 }
90
91 /* Sets the pkey_meth callback in an ENGINE structure */
ENGINE_set_pkey_meths(ENGINE * e,ENGINE_PKEY_METHS_PTR f)92 int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f)
93 {
94 e->pkey_meths = f;
95 return 1;
96 }
97
98 /*
99 * Internal function to free up EVP_PKEY_METHOD structures before an ENGINE
100 * is destroyed
101 */
102
engine_pkey_meths_free(ENGINE * e)103 void engine_pkey_meths_free(ENGINE *e)
104 {
105 int i;
106 EVP_PKEY_METHOD *pkm;
107 if (e->pkey_meths) {
108 const int *pknids;
109 int npknids;
110 npknids = e->pkey_meths(e, NULL, &pknids, 0);
111 for (i = 0; i < npknids; i++) {
112 if (e->pkey_meths(e, &pkm, NULL, pknids[i])) {
113 EVP_PKEY_meth_free(pkm);
114 }
115 }
116 }
117 }
118